Portable mold for concrete blocks



JuneZl, 1949. E. F. GREEN 2,473,748

PORTABLE MOLD FOR CONCRETE BLOCKS 7 Filed July 8, 1947 2 Sheets-Sheet l Inventor Edwin 1-. Green By @Mm June 21, 1949. E. F. GREEN PORTABLE MOLD FOR CQNCRETE BLOCKS Filed July 8, 1947 2 Sheets-Sh eet 2 Fig.3.

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Fig 5 Inventor Edwin E Green.

v v @mm WW Patented June 21, 1949 UN! TED STATES PATENT caries PORTABLE MULD FOR CONCRETEBIZOCKS Edwin F. iGreen, Ashland, Application July 8, 1947, "SerialNo. 7595,71

:3 Claims. '1

My invention relates to improvements inportable molds'fornnakingconcretebuildingblocks.

*The primary object of my inventionis to proviid'e a simple form of easily handled, portable mold *espedially-designed for easy and fast 'molding of "concretebuildingblocks *oneat a time "and 'for stripping the mold of the block "without lif hended -by my invention, together with the precise-nature of 'my'improvements, and the advantages thereof will be*readily'understoodwhen'the succeeding description -and *claims are read "with reference to the drawings, accompanyingand forming spa-rt of this specification.

In said drawings:

Figure 1 is 'a view "in perspective of "my improved mold in -'a preferred embodiment thereof positioned upright for filling with concrete, cement, -or the like;

Figure 2 is a .viewin ,transversesection with the mold showninbroken lines partly rocked over preparatony to ifitriillling;

Figure 3 is a view in longitudinalsection taken on the lined-130i Figure 2;

Figure 4 is a view in transverse section showing thermold completely rocked-over into inverted position and iliited .to strip the .same;

iEigurezfi :isafragmentary vieW in verticahsection taken on the line 5--5 of Figure 4 with the molded block eliminated;

Figure 6 is a view in longitudinal section taken on the line 6-45 of Figure 3 and drawn to a larger scale.

Referring to the drawings by numerals, the mold of my invention, as illustrated, comprises a rectangular mold box I of proper size for molding the usual concrete building block, and which is formed of light strong material, preferably aluminum, with side plates 2, end plates 3, a bottom pallet plate t and a pair of hollow cores 5, spaced apart and from the end plates 3 in the longitudinal center of said box and having closed upper ends. Outstanding, projecting flanges B, 1 extending along the top and bottom edges of the side plates 2 reinforce said edges, and ribs 8 extending along the end edges of said plates 2 reinforce the "same. A 'longitudinal, external 're'iniorcingrib Qi-s alsoprovided on eachyside pla'teiZ.

"Side pairs 'of short legs :HJ depend from the bottom 'edge flanges '1 and are "spaced from the ends 'fOf said side plates 2 with bosses "I I abovethe legs on said plates 2,, and *flanges "l, reinforcing said'legs.

A "pair of *cross bars "I? extendbetweenithe *legs It upon opposite sides of said box I with downturned ends 1,3, weldedor Utherwise suitably connected to said legs, said bars I? supporting the pallet plate it and the ,cores 5 which are suitably fixed .to lugs It upstanding from .said bars 1'2.

The'pa'lletplatetiis'suitablyapertured,as at "1'5, to fit :over the cores 5 zandlisfitte'd between the side piates 2 and 'end plates '3'Ito slideiin'to and out of said box I for-a purpose presently seen.

The end plates 3 are slidably "fitted in trans- Verse grooves It .in the ends oftheside plates 2 to be slidiin'to place and'to slide outwardly of the open top of the mold box I when said-box 'isin verted. The purpose of this will presently 12ppear. Outstanding, upper corner "stop lugs Hat the ends of top edge :reinforcing'ribs 1'8 on Said end plates '31, andwhich seat on stop lugs I9 on the :ribs 8 prevent sliding "of said end plates ,"2 downwardly out of place while the mold'box I ,is upright. L'Head'ed tie -rods 2i] extend across the ends-of themoldhox I with ends slidable through ears -2I on said ribs ,8, said rods being adapted .for engagement by lateral bottom edge stop lugs 22 on "the end plates $3 "to limit sliding of said end plates outwardly of the top :of the mold max I when saidboxfis inverted. Wing nuts 23 threaded on one ,end .of said rods '20 serve to draw the side -p1ates'2together tob'ind the end plates 73in the grooves I t and the pallet plate 4 between said side plates 2.

A tamping block 24, of any suitable material, such as wood, is provided to fit over the top of the mold box I and close the same.

A pair of arcuate rockers 25, of T-iron form in cross section, but preferably formed of aluminum, are bolted, as at 26, at one end thereof to the legs It! on one side of the mold box I to extend crosswise of said box with the other ends 21 thereof projecting above the top of said box to form abutments against which the tamping block 23 may be placed to align said block with the top of said box. Tangential legs 28 on said rockers 25, adjacent the ends 2! thereof, are bolted, as at 29, to the adjacent side plate 2 to gdditionally secure said rockers 25 to said mold ox I.

Referring now to the use of the described in- 3 vention. With the wing nuts 23 tightened, to bind the end plates 3 and pallet plate 4, in place, and the mold box I stood upright on a suitable bench, or the like, not shown, so that the rockers 25 are positioned on the side of the mold box opposite to that facing the user of the box, said box I is filled with concrete, or cement, material and tamped with the tamping block 24. After the material has been tamped and leveled off, the tamping block 24 is left in place on top of the mold box I with one side edge abutting the upper ends 2? of the rockers 25. After the material has set, the mold box I is grasped at the ends thereof, by the hands, and rocked over onto the rockers 25, as shown in broken lines in Figure 2, while the fingers hold the tamping block 24 in place and resting on the ends 2'! of said rockers 25. The mold box I is then rocked on the rockers 25 into inverted position with the tamping block 24 resting on the bench, not shown, and the mold box I resting on said block in inverted position. The wing nuts 23 are next loosened to loosen the side plates 2, end plates 3, and the pallet plate 4, and said box lifted by means of the tie rods 2a to strip the molded material, or block 30, as shown in Figure 4, from the mold box I. In this stripping operation, the end plates 3 slide downwardly out of the mold box I until the stop lugs 22 engage the tie rods 20 andthereby guide said box against the molded block 38 while said box is being lifted, and also guide the pallet plate 4 to slide out of the mold box I with the molded block 30'. After the mold box I has been lifted sufficiently for the end plates 3 to clear the molded block 30, and the pallet plate 4, said box may be set back into upright position on the bench. This will cause the end plates 3 to drop back into place, under the influence of gravity, after which the pallet plate 4 may be lifted off the molded block 30 and replaced in said mold box I. wing nuts 23 may be tightened to bind the end plates 3 in place, together with the pallet plate 4, in a manner which will be clear. The mold box I is now conditioned for refilling to mold another block. Another tamping block 24 may be used in proceeding with the molding of another block, or the same one used if desired after it has been cleared of the previously molded block 30. Obviously, the described rocking and lifting operations may be performed in substantially one continuous operation so that the device can be used quickly and easily, and stripping of the mold box I can be accomplished without lifting any appreciable weight whereby molding of successive blocks may be accomplished with ease and without tiring the user of the device.

Then the The foregoing will, it is believed, sufllce to impart a clear understanding of my invention, without further explanation.

Manifestly, the invention, as described, is susceptible of modification without departing from the inventive concept, and right is herein reserved to such modifications as fall within the scope of the appended claims.

Having described the invention, what is claimed as new 182 l. A mold box for building blocks adapted to he stood upright for filling with moldable material and to be stripped of molded material by inverting and lifting the same, a pair of rockers on one side of said box for rocking said box into inverted position for lifting inverted, and end plates in said box slidable partway out of the same when the box is lifted in inverted position to thereby guide lifting of the box relative to the molded material.

2. A mold box for building blocks adapted to be stood upright for filling with moldable material and to be stripped of molded material by inverting and lifting the same, a pair of rockers on one side of said box for rocking said box into inverted position for lifting inverted, end plates in said box slidable partway out of the same when the box is lifted in inverted position to thereby guide lifting of the box relative to the molded material, and means for binding said plates in said box against sliding operative to release said plates for sliding when said box is inverted.

3. A mold box for building blocks adapted to be stood upright for filling with moldable material and to be stripped of molded material by inverting and lifting the same, a pair of rockers on one side of said box for rocking said box into inverted position for lifting inverted, end plates in said box slidable partway out of the same when the box is lifted in inverted position to thereby guide lifting of the box relative to the molded material, and means for binding said plates in said box against sliding operative to release said plates for sliding when said box is inverted including end cross rods on said box providing hand holds for lifting the box.

EDWIN F. GREEN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 790,697 Mason May 23, 1905 1,590,429 Emert June 29, 1926 

